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The Operational Racks view is the primary progress board for DC standup. It shows where each device is, what happened there, and which action is currently available. The full pipeline is:
Some device types skip stages. A column means the stage a device is at or waiting to start, not the last stage it completed. After a stage succeeds, the device normally moves to the next column as not_started.

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The placement rule

Current customer handover state comes first. If Fleet Manager reports a device as available or in_use, the board places it at the end of its pipeline with succeeded: release for customer hosts, or enrolment for hypervisors whose pipeline ends there. Job history does not move a currently customer-ready device back to an earlier column.
For devices that are not currently available or in_use, placement follows the newest attempt that was not cancelled, terminated, or superseded: A device cannot skip an earlier stage that never completed successfully. This is the prefix clamp: for example, a later single-node attempt cannot place a device past a failed enrolment. The clamp does not apply while current operational_status already proves the device is available or in_use.
The latest Job link can therefore open a cancelled or failed attempt while the cell reflects an earlier result—or current customer-ready state. This is expected: the column answers where the device is now; the Job link and gate details preserve how it got there and any evidence gaps. When that latest Job is pending or running, the cell keeps the concurrent_workflow_running suppression reason alongside no_next_stage, even though current customer-ready state keeps its placement green. The board is recalculated on every refresh; there is no stored pipeline column to backfill. Use it for orientation, not as the only proof for a diagnosis or as an unchecked bulk-action list. For raw Job states, see Status Reference. For exact device-specific pipelines, placement ordering, acceptance-gate rules, customer-ready overrides, and the prefix clamp, see Device State Machines.